667219280712 has 256 divisors, whose sum is σ = 1877686272000. Its totient is φ = 196587705600.

The previous prime is 667219280701. The next prime is 667219280753. The reversal of 667219280712 is 217082912766.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81057637 + ... + 81065867.

It is an arithmetic number, because the mean of its divisors is an integer number (7334712000).

Almost surely, 2^667219280712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667219280712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938843136000).

667219280712 is an abundant number, since it is smaller than the sum of its proper divisors (1210466991288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667219280712 is a wasteful number, since it uses less digits than its factorization.

667219280712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472 (or 8468 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 667219280712 in words is "six hundred sixty-seven billion, two hundred nineteen million, two hundred eighty thousand, seven hundred twelve".